Inventor · disambiguated record
Johann-Wilhelm Frey
Also filed as: FREY JOHANN-WILHELM
7 granted patents·57 citations·filing 1993–2010
80Inventor score
Files withDOW GLOBAL TECHNOLOGIES INC3DOW CHEMICAL CO2DOW GLOBAL TECHNOLOGIES LLC1HEFNER JR ROBERT E1
Top patents by PatentIndex Score
7 records- 0184US5288926AProcess for preparing a bisphenolDOW CHEMICAL CO·Filed 1993·Granted Feb 22, 1994·35 cites·19 claims
- 0267US5723688AProcess for preparing an adduct of a bisphenol with phenolic compoundDOW CHEMICAL CO·Filed 1995·Granted Mar 3, 1998·15 cites·18 claims
- 0356US6740684B2Process for producing a strong-acid cation exchange resinDOW GLOBAL TECHNOLOGIES INC·Filed 2001·Granted May 25, 2004·5 cites·8 claims
- 0453US7067704B2Process for purifying bisphenol-aDOW GLOBAL TECHNOLOGIES INC·Filed 2003·Granted Jun 27, 2006·1 cites·19 claims
- 0548US7586012B2Process for recovering an adduct of a bis(4-hydroxyaryl)alkane and a phenolic compoundDOW GLOBAL TECHNOLOGIES INC·Filed 2004·Granted Sep 8, 2009·1 cites·20 claims
- 0647US7989514B2Strong-acid cation exchange resinsDOW GLOBAL TECHNOLOGIES LLC·Filed 2007·Granted Aug 2, 2011·0 cites·14 claims
- 0744US8937145B2Epoxy resin compositionsHEFNER JR ROBERT E·Filed 2010·Granted Jan 20, 2015·0 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →